Ps Audio PPP parts

Was wondering how available replacement parts are for the PPP? Had mine for 4yrs now, still going strong. Just want to make sure parts are available if something was to go bad(knock on wood. LOL) Any idea what the power cartridge goes for?

Parts are available and we repair PPP and the cartridges in the factory.

A local dealer who used to have your products is selling a Power Cartridge for $99. Figuring I’ll pick it up as a spare. Would you say the price is fair?